Cutter mechanism for needle looms



June 25, 1940.

J. GABLER 2,205,623

CUTTER MECHANISM FOR NEEDLE LOOMS Filed lay 16. 1938 0 JOAAMV 0/54 [5, 05:54 5.50,

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Patented June 25, 1940 UNITED STATES CUTTER MECHANISM FOR NEEDLE LooMs Johann Gabler, deceased, late of Ettlingen, Germany, by Sophie Gabler, sole heir, Ettlingen, Germany, assignor to F. C. Huyck & Sons, Rensselaer, N. Y., a corporation of New York Application May 16, 1938, Serial No. 208,301

3 Claims.

This invention pertains to the type of weaving apparatus known as needle looms and relates more particularly to the cutting of the weft threads during the weaving operations.

' In looms of the character mentioned, the weaving operation is performed by inserting the weft thread in loop form, from one side of the web and as far as the middle of the latter. After having been cut the thread is drawn out as a single strand. A well known loom of this type works in such manner that the weft loop is cut off at a location between the outermost warp threads and the middle of the web, and the resulting weft end is used on the side to form the selvage. This type of cutting device, however, is suitable only for Weft feeding devices where the weft thread is inserted alternately from both sides. If the weft thread is inserted from one side only, and the common type of weft cutting device is used, the severed weft thread end of each inserted weft thread will be woven in on the same side of the web. Thus, said edge would become too thick. Under such conditions a cutting off device is out of the question.

" One of the objects of the present invention is to provide a cutting device for needle looms which will be operative where the weft thread is at all times inserted from one side of the web, andso arranged as to avoid objectionable thickening of one edge of the web. A further object is to provide means for cutting the weft threads closely adjacent to the outermost warp thread and laterally outside of the latter, whereby the weft ends will project from the edge of the cloth, but are cut as short as possible, so as to be of approximately equal length and waste of material is thereby avoided. A further object is to provide a weft thread cutting mechanism of simple construction and effective operation, which may be readily attached to a loom of the type mentioned. A further object is to provide a cutter knife so constructed and arranged that it may be operated at a location immediately next to the outermost warp thread, but entirely outside of the web, without damaging the latter.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawing:

Figure 1 is a front elevation of a cutting mechanism conforming to the invention. Figure 2 is a side elevation with parts broken away. Figure 3 is a detail side view of the slidable cutter. Figure 4 is a top plan diagrammatic view illustrating the arrangement of the cutter with respect to the web. Figure 5 is a transverse sectional view on the line 5--5, Figure 2. Figure 6 is a cross sectional view on the line 66, Figure 2. Figure 7 is a cross sectional view on the line l1, Figure 2 Figure 8 is a cross sectional view on the line 8 8, Figure 2.

Referring to the drawing, l0 designates a carrier rod on which is slidably mounted a guide box ll, provided with a reduced portion l2 extending longitudinally therefrom. Said extension constitutes a cutter head which is provided with a thread receiving opening [3, a longitudinally disposed cutting rib I4 being located within said opening l3 and provided with an indented portion having serrations thereon, said rib constituting a cutter. The upper wall of the recess [3 constitutes a stop shoulder I4 for the movable cutter blades to be later described. Itwill be noted that the corner opposite the recess I3 is rounded as indicated at I5. Said guide I member is provided with two longitudinal channels [6, which are separated by a partition wall l1, and in which are slidably mounted cutter blades 18, said partition wall being positioned in the same vertical plane as said cutting rib l4.-

The lower ends of said blades are fixedly secured to the rod Ill. The blades l8 are so constructed I and arranged that they are free to slide longitudinally within the channels- N5 of guide II and extension l2, so that their upper ends will have sliding engagement with the opposite side faces of the rib l4 and in a manner to engage and sever the weft thread a. while the latter is located within the recess l3 and engaged with the teeth [4. Each blade is provided with a serrated cutting end I9.

The carrier rod Ill'is provided with a transverse pin 20, the ends of which project into slots 2| in the side walls of guide H. An abutment collar 22 is anchored to the rod II] in suitable manner, as by a set screw 23, and a coil spring 24 encircling said rod [0 reacts between said collar and the lower end of the guide H.

The rod I0 is pivotally connected to an actuator lever 25 by means of a link 26, said lever being rocked by means of a cam 21 mounted on a shaft 28, which is operatively connected with the weft feeding mechanism of the loom. Upward movement of the guide H upon rod I0 is limited by a stop bar 29.

As illustrated in Figure 4, the cutter device indicated in its entirety by C is located to one side of the web, but closely adjacent the outermost warp thread b. The weft thread a. is shown as having been engaged with the cutter and as being laid as the gripper member (not shown) carries cutter head l2 as well as the cutter blades I 8..

During the upward movement of the rod In the stop 21 will temporarily arrest movement of the guide II and the cutter head l2. It is at this stage that the weft thread is engaged with the cutter head. The weft thread a. is insertedinto the shed in the manner wellunder'stood in the art, and during the inward movement of the gripper said thread is deposited withinthe recess I3 of the cutter head l2. head l2 reaches its highest position before the weft is inserted during-thenormal operation of the loom, the Weft thread a is withabsolute certainty placed within the recess 13, the'serrations 14 being so located as to insure positive engagement of the Weft thread. The sliding connection of the blades l8 with theguide l I is such that even though movement of the guide II is temporarily arrested by the stop 29, the blades l8 will continue to travel upwardly and in engagement with utheopposite sides of the rib l4, until they move across the recess l3 in such manner as to engage and sever the warp thread, the upward movement of the blades being limited by the stop shoulder l4; At the same 'time,.the movement of the rod d0 places a tension upon the spring 24, so that as the cam 21 moves past the high point, the spring will return all of the cutter parts to their normal positions ready for thenext cutting operation.

The advantages of the invention will be readily :understood by those skilled in the art to which the invention belongs. For instance, an .important advantage is gained by placing the cutting mechanism at a position outside of the shed but as close to the outermost warp thread as possible, .50 that the ends of the severed warp thread in the completed fabric, which protrude from the edges of the web will be very short and of uniform length. In this way waste of material is avoided and. bunching of the cut ends on one side of the fabric is prevented. Another importantadvantage is that the device is capable of operating very close to the shed without damaging the fabric or the. threads in any manner.

Having thus explained the nature of the invention and described an operative manner -of constructing and using the same, although without Inasmuch as the. cutter.

attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what is claimed is:

1. Weft thread cutting mechanism of the character described comprising a cutter head having a longitudinally disposed cutting rib provided with a thread-receiving recess, said cutter head also having relatively spaced guideways arranged in planes parallel with said rib but on opposite sides. thereof, cutter blades longitudinally movable in said guideways and in a manner to have sliding. engagement with the side faces of said rib and coacting with the rib to sever the weft thread, means for reciprocating said cutter head and said cutter blades in unison, and means for temporarily arresting movement of said cutter head during its movement in one direction, said 1 cutter blades being free for continued cutting movement in the same direction.

2. A weft thread cutting mechanism of the character described comprising a cutter head having a longitudinally disposed cutting rib provided with a thread-receiving recess, said cutter head also having relatively spaced guideways separated by a partition wall lying in the same longitudinal plane as said rib, cutter blades longitudinally movable in said cutter head and separated by said rib, means for reciprocating said cutter head and said blades in unison, and means for temporarily arresting. movement of l the cutter head during movement in one direction, the cutter blades being free for continued movement in the same direction, said blades being so relatively positioned as to slidingly engage the side faces of said ribs during such movement.

3. A weft thread cutting mechanism of the character described comprising a guide provided with a recessed cutter head, a longitudinally disposed cutting rib Within the recessed portion of said cutter head, said rib having a thread-receiving recess, said guide member having laterally spaced guideways arranged in planes parallel with said rib but on'opposite sides. thereof, cutter blades longitudinally movable in said guideways, means. for reciprocating said guide member, cutter head and cutter blades in unison, means for temporarily arresting movement of the guide member and the cutter head during movement thereof in one direction, the cutter blades being free to continue movement in said direction and in a manner to have sliding engagement with the side faces of said rib, said cutter head having a stop shoulder for. saidcutter blades.

SOPHIE GABLE'R. Sole. Heir of Johann Gabler, Deceased. 

